<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="goAddpage">添加商品</el-button>
        </el-col>
      </el-row>

      <!-- table表格区域 -->
      <el-table :data="goodslist" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
        <el-table-column label="商品重量" prop="goods_weight" width="70px"></el-table-column>
        <el-table-column label="商品创建时间" prop="add_time" width="140px">
          <template slot-scope="scope">{{scope.row.add_time | dateFormat}}</template>
        </el-table-column>
        <el-table-column label="操作" width="130px">
          <template slot-scope="scope">
            <!-- 修改按钮 -->
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="listEditDialog(scope.row.goods_id)"
            ></el-button>
            <!-- 删除按钮 -->
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeById(scope.row.goods_id)"
            ></el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 编辑对话框 -->
      <el-dialog title="修改商品" :visible.sync="listVisible" width="30%" @close="editDialogClose">
        <el-form :model="listForm" :rules="listFormRules" ref="listFormRef" label-width="70px">
          <el-form-item label="分类名称" prop="goods_name">
            <el-input v-model="listForm.goods_name"></el-input>
          </el-form-item>
          <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="listForm.goods_price"></el-input>
          </el-form-item>
          <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="listForm.goods_weight"></el-input>
          </el-form-item>
          <el-form-item label="商品数量" prop="goods_weight">
            <el-input v-model="listForm.goods_number"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="listVisible = false">取 消</el-button>
          <el-button type="primary" @click="editList">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 15, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        background
      ></el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 查询参数对象
      queryInfo: {
        // 查询参数
        query: '',
        // 当前页码 默认为1
        pagenum: 1,
        // 每页显示条数
        pagesize: 10
      },
      // 商品列表
      goodslist: [],
      // 总数据条数
      total: 0,
      listFormRules: {
        goods_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ]
      },
      // 查询表格的信息
      listForm: {},
      // 修改对话框 默认隐藏
      listVisible: false
    }
  },
  created() {
    this.getGoodsList()
  },
  methods: {
    // 根据分页获取对应的商品列表
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败！')
      }
      this.$message.success('获取商品列表成功')
      // console.log(res.data)
      this.goodslist = res.data.goods
      this.total = res.data.total
    },
    handleSizeChange(newSize) {
      // 绑定到 queryInfo
      this.queryInfo.pagesize = newSize
      // 从新获取数据
      this.getGoodsList()
    },
    // 监听页码值发生的变化
    handleCurrentChange(newPage) {
      // 保存到queryInfo的pagenum中
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 根据id查询数据
    async listEditDialog(id) {
      // 向后台发送请求
      // console.log(id)

      const { data: res } = await this.$http.get('goods/' + id)
      // console.log(2, res)

      // 渲染数据
      this.listForm = res.data
      // console.log(1, this.listForm)
      // 打开修改对话框
      this.listVisible = true
    },
    // 监听对话框关闭事件
    editDialogClose() {
      // 对话框关闭重置整个表单
      this.$refs.listFormRef.resetFields()
    },
    editList() {
      // 预校验
      this.$refs.listFormRef.validate(async valid => {
        // console.log(valid)
        // 判断校验结果
        // console.log(1, this.listForm)
        if (!valid) return false
        // 校验成功 发送网络请求
        const { data: res } = await this.$http.put(
          'goods/' + this.listForm.goods_id,
          {
            goods_name: this.listForm.goods_name,
            goods_price: this.listForm.goods_price,
            goods_weight: this.listForm.goods_weight,
            goods_number: this.listForm.goods_number,
            goods_cat: this.listForm.goods_cat
          }
        )
        // 判断用户信息
        if (res.meta.status !== 200) {
          return this.$message.error('修改信息失败')
        }
        // console.log(11, res)
        // 关闭对话框
        this.listVisible = false
        // 刷新数据列表
        this.getGoodsList()
        // 提示修改成功
        return this.$message.success('修改信息成功')
      })
    },
    // 删除按钮
    async removeById(id) {
      // 删除信息提示框
      const confirmResult = await this.$confirm(
        '此操作将永久删除该商品, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      const { data: res } = await this.$http.delete(`goods/${id}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      this.$message.success('已经删除成功')
      this.getGoodsList()
    },
    // 点击添加商品按钮，跳转页面
    goAddpage() {
      // 跳转页面
      this.$router.push('/goods/add')
    }
  }
}
</script>

<style lang="less" scoped>
</style>
